I don’t know if a lot of people know this this, but you can create your own challenges in the challenges section of your service record. The shorter the time you set your challenge to, the more credits you get. The easiest for me is to create a head shot challenge and set the number of head shots to 100 and the time to 3 hours and then do the same for kills. This will allow you to do 2 at the same time. You ruffly get around 12000 for the head shot challenge and 7500 for the kill challenge. I just wanted to let people know about it and i also forgot to mention, most of the time you get more credits for your custom challenges then the ones reach puts out and you can hand in the challenges early after you complete them and just start it again but you will not receive the credits until the 3 hours are up.
Thank you for spelling all this out, but you should know that pretty much everyone has known about this for a very long time.
The real secret is to use Firefox and the iMacros addon to automate the creation and turning in of your challenges.
Makes the boosting incredibly fast.
It is not Boosting and a lot of people do not know this do to new people always starting to play the game. I did not know this until last week. Thank you for posting a reply 
Absolutely, i make about 20,000 Cr in 3 hours, plus 10,000 cR from the average game completion. Ranks me up faster and quicker.
> I don’t know if a lot of people know this this, but you can create your own challenges in the challenges section of your service record. The shorter the time you set your challenge to, the more credits you get. The easiest for me is to create a head shot challenge and set the number of head shots to 100 and the time to 3 hours and then do the same for kills. This will allow you to do 2 at the same time. You ruffly get around 12000 for the head shot challenge and 7500 for the kill challenge. I just wanted to let people know about it and i also forgot to mention, most of the time you get more credits for your custom challenges then the ones reach puts out and you can hand in the challenges early after you complete them and just start it again but you will not receive the credits until the 3 hours are up.
WOOOOOOOOOOOOOOOOOOW! please tell me you are trolling, lol!